B=2/3+1/3.(-4/9+5/6):7/12 C=(2^3.5.7).5^2.7^3/(2.5.7^2)^2 26/10/2021 Bởi Jade B=2/3+1/3.(-4/9+5/6):7/12 C=(2^3.5.7).5^2.7^3/(2.5.7^2)^2
Đáp án: `B=2/3 + 1/3 (-4/9+5/6) : 7/12``B=2/3 + 1/3 × (-8) + 15/18 × 12/7``B=2/3 + 7/18 × 4/7``B=2/3 + 1/9 × 2``B=2/3 + 2/9``B=6+ 2/9``B=8/9` $\dfrac{\left(2^3.5.7\right)\left(5^2.7^3\right)}{\left(2.5.7^2\right)^2}=\dfrac{2^3.5^37^4}{2^2.5^27^4}=2.3=6$ Bình luận
Đáp án:
Giải thích các bước giải:
Đáp án:
`B=2/3 + 1/3 (-4/9+5/6) : 7/12`
`B=2/3 + 1/3 × (-8) + 15/18 × 12/7`
`B=2/3 + 7/18 × 4/7`
`B=2/3 + 1/9 × 2`
`B=2/3 + 2/9`
`B=6+ 2/9`
`B=8/9`
$\dfrac{\left(2^3.5.7\right)\left(5^2.7^3\right)}{\left(2.5.7^2\right)^2}=\dfrac{2^3.5^37^4}{2^2.5^27^4}=2.3=6$